OSB51204C1E is an optical sensor part manufactured by Optosupply. It is a 4-channel, open-collector output sensor that uses Infrared (IR) technology. The OSB51204C1E is capable of sensing the presence of an object when it is within the sensing distance of up to 500mm and can detect differences in reflective surfaces as small as 0.8mm. The sensor operates on a standard 5VDC input voltage and provides a load carrying capacity of up to 50mA over 400ms at 5V. The OSB51204C1E is RoHS compliant and meets the requirements for a wide range of outdoor applications.